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What is a small system variance?

April 26, 2017small system variance

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What is a small system variance?

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A small system variance enables a system to utilize a treatment technology that achieves the maximum removal of the contaminant that is both affordable and protective of public health, but does not remove the contaminant to the degree specified by the drinking water regulation. States may grant small system variances only for those drinking water standards that EPA has determined are unaffordable for one or more categories of systems.